Sources confirmed that Selena's stay at the treatment center, which they described as "private" and "super intense," is mainly about her mental health. "Selena is dealing with lupus, but this break is to focus on her mental health," the said. "She can go to a very dark place." This is the "Kill 'Em With Kindness" singer's second time in rehab after her first stay in 2014, which was also a result of side effects from her treatment for lupus. So far her rep has yet to make an official statement.